Update website for 15.4.0

(cherry picked from commit 5ce8853ccb2e4677eb6a9d183e8086fd0d6367d4)

_config.yml

@@ -2,9 +2,9 @@
 name: React
 description: A JavaScript library for building user interfaces
 url: https://facebook.github.io
-baseurl: "/react"
-permalink: "/blog/:year/:month/:day/:title.html"
-paginate_path: "/blog/page:num/"
+baseurl: /react
+permalink: /blog/:year/:month/:day/:title.html
+paginate_path: /blog/page:num/
 paginate: 5
 timezone: America/Los_Angeles
 highlighter: pygments
@@ -60,13 +60,13 @@ sass:
 gems:
 - jekyll-redirect-from
 - jekyll-paginate
-react_version: 15.3.2
+react_version: 15.4.0
 react_hashes:
-  dev: bQIyvl+8Ufi5KiKZPG9VItNWmhcAXA1pa5nHIEoBGob+rdbjJnpNV3s288Mz2yZu
-  prod: drG4TSBgFQ0Hb/A3ynRyFDT22irpJDL+duuxvYD5mkC9adCYDqEwnX13371waqiH
-  addons_dev: gCLxBq3yes/qREmjcw3Tdk5dUh3iB54huWqgxq1lAJZTYzLahJqEik5ZiVnq9Zt4
-  addons_prod: pmUKSclxJREtkrfcUJvBYTEoJCvO6Vj5ob8IgPSiIX0G3c4w2dKBJMoGEhlv9Gev
-  dom_dev: ZzFfcTbsRst34N23lWs6TtlfonXwDgpeALh+ObwYXav5BSo0j7KsaAtcdn+xrnS1
-  dom_prod: MTxlP+/p3lyvc2+LZc2B5xy5reGwrA80whnflxNc6zPgLUmMvbwUoKy7qorBH+P4
-  dom_server_dev: jHjmbawtj2AhVuJlmE/O1HXAIbQMzHvoXRZEVdhTSrfJXACRVpZm/BpuAi4K89xn
-  dom_server_prod: LCYUMPll/9t/UsNa/Q1zfti2awxxiiczBUZcQBdeGACH0sU6BEAllZuGxo5b6/kf
+  dev: buVLzxzBI8Ps3svVMSUurNdb5dozNidH5Ow4H0YgZeia3t6Oeui2VLpvtAq1fwtK
+  prod: nCjsa0kjNQPQdxWm12/ReVJzfBJaVubEwwDswyQDGMKYJmeWv3qShMuETfU5fisu
+  addons_dev: /u97pKzBwasbC1yj8gSIq1z30o4ZTUX9j1Mv/hyAjmG41ydTNHw9JFOhwFbDgxmR
+  addons_prod: /p86n4b5VTlWoA/INEHQZ+zjx9g1pJduoFmTEJ6fSzFTq1mBaXaBcWVGtZJXD68L
+  dom_dev: lUxkeWjg3I3lXmxcM1gvgo0yvm2w9alc1osa4L8yWZFO6l/vg9h5hSlHPFioltrm
+  dom_prod: u8x1yIGN9IjGNYbBaDMsp1D4MK3sCmMU13mcBX+bm+aMo5+gaT8HIwIj39GlXaRS
+  dom_server_dev: Okj1hVX1VF+oZSkPcJQ/YcnW6bsIpeni222ylwUaMnSmdCe0zWKmMwpFMVqzy4Ws
+  dom_server_prod: wiA4u+G5fEfF4xzhhVnNWeSifVyttoEIpgc3APaMKQgw5A4wHbEMihf63tk1qoyt